時間順序判断における視聴覚間の急速再較正と空間周波数による処理速度の違いとの関連

抄録

Temporal synchrony between visual and auditory stimuli plays an important role in audiovisual integration. Audiovisual temporal synchrony is recalibrated by the most-recent timing of audiovisual stimuli. My previous study has shown that this recalibration happens when there is compensation for neural processing speed differences based on spatial frequency (SF) using a simultaneity judgment task. The present study tested this finding using a temporal order judgment task. In this experiment, participants judged the temporal order of a pure tone and a Gabor patch. The results indicated that the high SF stimuli induced a larger positive rapid recalibration than the low SF stimuli. However, this difference is mostly explained by a simple bias repeating a previous judgment. Therefore, the current study has confirmed that rapid recalibration is not affected by the differences in neural processing speed based on SF. Furthermore, this experiment suggested that the magnitude of choice-repetition bias should also be taken into account when comparing the magnitude of rapid recalibration in the temporal order judgment task.